When installing redhat 6.1 with a german keyboard, then chars as / for example are not recognized correctly during redhat installation, when using the text mode (/ on german keybords ha another position than on us keyboard). So, I have to look where / on US keybords, and then I have to type the - sign. Additionally, when choosing special chars for the initial root password which differ between us and german keyboards, then a later login fails because of wrong root password. This is based on the same reasons as above.
assign to installer
The loading of keymaps is vastly improved in the latest installer (available in beta) so this problem should be fixed. Selecting a German kayboard at the outset of the installer will load load the correct keymap and you will be able to type as you normally would.